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We assessed the variability of the series resulting from the subtraction of the RR intervals from the pulse intervals (PI-RR) and examined how it was affected by two maneuvers that modify the cardiac autonomic status. The RR, PI, PI-RR and respiratory series of 20 healthy subjects were computed during three 5-min conditions: supine, standing and exercise. High frequency (HF) and low frequency (LF)...
Self similarity is a promising tool for quantifying alterations in cardiovascular dynamics, although the effect of the autonomic control on the scaling structure of cardiovascular signals is still unknown. To address this issue, we studied spinal-cord injured subjects as a model of progressively impaired vascular control. We considered 24 able-bodied subjects (AB) and 23 paraplegics with lesion at...
Self similarity is a promising tool for quantifying alterations in cardiovascular dynamics, although the effect of the autonomic control on the scaling structure of cardiovascular signals is still unknown. To address this issue, we studied spinal-cord injured subjects as a model of progressively impaired vascular control. We considered 24 able-bodied subjects (AB) and 23 paraplegics with lesion at...
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